Help:Reasons of the armistice of 1st world war???

The exact reason was that the Germans and their allies lost, while the coalition of England, France, the USA and their allies won. Quite simple, really.

It would take pages and pages to give even a superficial response which took notice of all the relevant factors--history is never simple.

However, the simplest superficial answer is that Ludendorf did not want Germany invaded. The Allied plan had been to place the Americans on the right (and they were not expected to do well), the French in the center, and the Anglo-Commonwealth-Belgian forces on the left. The Americans were to be the "hinge" upon which the offensive turned to drive the Germans out of Belgium.

The Americans did better than anyone expected--including General Pershing. Pershing was contemptuous of his allies, because they underrated the American troops. But even he was caught off-guard by the speed of the American advance. American divisions were taking objectives for the end of the first week by the end of the second day. The 42nd Division, the "Rainbow Division," was slated to take Sedan by the end of the first week, and was to be given new objectives at that time. The division, commanded by its acting Division Commander, Douglas MacArthur, reached Sedan in under 40 hours.

The Americans were so far outrunning their allies, that the German Army was threatened with a double envelopment--the Canadians and Australians were sweeping through Brabant and along the Channel coast to wrap up the German right, and the Americans were about to envelop the German left. Not only would this have completely "bagged" the German army, but Germany itself would have been open to immediate invasion, with no possibility of effective defense.

The Germans had completely ravished Belgium and northern France. When they were retreating to contract and solidify their lines, before the Allied offensive, they had blown up factories, mines, even historical buildings such as churches, castles, monasteries, manor houses--and the Allies, especially the Belgians and French, were Hell-bent on revenge. Ludendorf feared reprisals if the allied armies broke into Germany, so he asked for an armistice.

Despite inital stunning successes, the German 1918 Spring Offensive, launched in late March, had failed by mid-July, bogging down and finally grinding to a halt (within artillery range of Paris) due to mounting logistic difficulties and the impact of the arrival of a swelling avalanche of American forces and materiel. Bolstered by the mounting American presence, the Allies in August of that year launched a series of offensives which by early September had pushed the Germans back to The Hindenburg Line, their 1914 starting point, and by early October it was clear the Germans no longer were able to maintain a cohesive defense. As October came to an end, the Allies had the initiative everywhere, and the morale of the German military and civilian populace had collapsed. Mutinies and domestic unrest in late October-early November brought down the German government, and its successor government moved swiftly to negotiate a peace. See: The 1918 Revolution

Short answer (even shorter than my first post): the Germans surrendered because they saw that, if they didn't, their country was about to be invaded.

Besides the loss of irreplaceable elite elements in the Spring Offensive, the fact that Britain and France were flush with supplies after the u-boat campaign was negated, and the arrival of the Americans, Germany had even bigger problems to worry about.

The naval blockade was having a devastating toll on Germany. Industrial output was in a free-fall, and starvation loomed for the civilian populace. They could not secure enough nitrates for fertilizer, and had little access to imported foods of any kind - forcing the introduction of ersatz foods like clover flour, and acorn coffee.

In addition to the threat of starvation there were other problems mounting for Germany. In 1918 the Spanish Influenza hit Germany, causing many thousands of deaths and untold loss of labour from illness. With the losses on the front, the economic downturn, the rationing and ersatz foods, and the threat of starvation looming, German leaders feared something even worse than surrender or defeat and occupation; the possibilty that Germans might rise in a Bolshevik revolution similar to what had happened in Russia.

The Germans released Lenin from prison into Russia to foment trouble for the Tzar to keep the Russians out of the war. The Bolshevik Revolution occurred in 1917.